CSS - pause-before

Description:

The pause-before property defines the duration of a silent pause to be inserted before the content of an element.

Possible Values:

time: Any time value (e.g., 300ms); the pause will be the length of time specified..

percentage: The length of the pause is dictated by the value of speech-rate. Thus, pause-before: 50% would yield 250ms if the speech rate is two words per second (120 words per minute), and 500ms if it's one word per second (60 words per minute).